Science & Mathematics - 16 December 2007

2007-12-16 02:14:53 · 2 answers · asked by Tr4ck4Inc@ 2 in Chemistry

how do the properties of the lanthanide metals compare to those of the alkaline earth metals?

2007-12-16 02:14:15 · 2 answers · asked by Tr4ck4Inc@ 2 in Chemistry

someone please help because im so stuck

2007-12-16 02:13:23 · 1 answers · asked by <3 Due September 2010 <3 3 in Chemistry

why does sodium have a higher ionization energy than cesium?

2007-12-16 02:12:20 · 3 answers · asked by Tr4ck4Inc@ 2 in Chemistry

2007-12-16 02:11:29 · 2 answers · asked by Steve C 1 in Chemistry

2007-12-16 02:10:24 · 1 answers · asked by Steve C 1 in Chemistry

Two students are in the library sitting across the table from each other. One student takes a book with a mass of 1.65 kg and pushes it across the table with a net force of 6 N. What is the acceleration of the book?

2007-12-16 02:08:04 · 2 answers · asked by molly 1 in Physics

2007-12-16 02:07:00 · 2 answers · asked by Anonymous in Chemistry

thanks

2007-12-16 02:06:52 · 9 answers · asked by hello! 1 in Mathematics

f(x)=x^2, g(x)=(x^3)(e^x),
h(x) = (x^2)(e^x) ; the real line.

differential equations problem.
Please show how you got it. Thank you.

2007-12-16 02:06:15 · 2 answers · asked by Anonymous in Mathematics

a planet has a mass of 6.2*10^25 kg and a radius of 2.42*10^6m. Determine the gravitational acceleration of the planet. Also determine the value of the gravitational acceleration of the planet that is three planetary radii away from the surface of the planet.

2007-12-16 02:05:17 · 3 answers · asked by Franny 3 in Physics

chem laboratory

2007-12-16 01:57:48 · 2 answers · asked by Donkey_Kong 1 in Chemistry

2007-12-16 01:51:57 · 2 answers · asked by ramesh 1 in Engineering

can someone help me find a complex number w/ an absolute value between 3 and 8 please? im confused!

2007-12-16 01:50:34 · 5 answers · asked by anna 1 in Mathematics

thanks

2007-12-16 01:48:36 · 10 answers · asked by hello! 1 in Mathematics

my cousin took astrology in highschool and her teacher sid that when you travel through space the farther you are away from earth the world looks younger like you can see dinosaurs or something

2007-12-16 01:47:11 · 15 answers · asked by Anonymous in Astronomy & Space

Hi,

I need to find the value of x in this equation and I am clueless! An explanation would be great!

0 = (x-2)^2-16

Thanks!

2007-12-16 01:46:38 · 5 answers · asked by Jack D 1 in Mathematics

Ocean Currents
Elevation
Latitude/Location
Near Water
Wind

What else ?!
also how do those affect climate ?

2007-12-16 01:44:40 · 0 answers · asked by Anonymous in Geography

I was prescribed these for depression and anxiety, I read the instructions and I know that it is normal to have side effects for the first 2 weeks or so, I took the first pill today but I wasn't prepared for how wierd it would make me feel. I have panic attacks anyway, but right now I feel really paranoid, shaky, sick, headache, sweating, lightheaded, and I keep feeling suddenly tearful etc, I can't tell whether I'm having a panic attack because I was worried about taking the pills or if the pills are making me feel like this, please help, I'm home alone just now and I need advice/reassurance. Has anyone else taken these, did you feel like this?

2007-12-16 01:43:14 · 10 answers · asked by Anonymous in Medicine

2007-12-16 01:42:19 · 9 answers · asked by -cArLa- 1 in Astronomy & Space

2007-12-16 01:41:50 · 15 answers · asked by T.M. 6 in Astronomy & Space

Most satelites I hear of are sent out to space, have any been put in a planet orbit maybe at a stationary point to map the time dependent thermodynamics of the orbit or at that point in the orbit of a planet other than earth? What is easiest possibility?

2007-12-16 01:40:38 · 2 answers · asked by Dan M 1 in Astronomy & Space

Please only answer if you are a structural engineer, doing such work...Excuse my ignorance, but.... We are considering some (fairly minor) alterations to our house. I realize everything structural should be taken seriously, but sometimes it seems overdone. Consider adding a single window to a load bearing wall framed with 2x4's. One could argue such a wall should not exist, but it does. Anyway, if one 2x4 is cut to make the opening, and a triple 2x8 header installed, this is inarguably overkill, and would only cost about $15 for material. But, I often hear 'consult....' with such an issue. That stops me dead in my tracks because...If an engineer is going to 'certify' such a job, I can envision he may first want to ensure that the studs, foundation, and ground on either side of window can support new load. Perhaps he should also supervise the removal, temporary support, and installation. This could cost $1000's. So, what do I do for a project needing several seemingly simple changes?

2007-12-16 01:37:29 · 2 answers · asked by Anonymous in Engineering

i posed my dad the same good question while watching the science channel, i was wondering the samething. so what is the difference between a Pulsar and a Quasar? i'm really wanting to know.

2007-12-16 01:36:07 · 6 answers · asked by whitewolfyuki 3 in Astronomy & Space

2007-12-16 01:32:38 · 8 answers · asked by stallone4004 1 in Astronomy & Space

Which one would you pick?

2007-12-16 01:30:11 · 9 answers · asked by Mr. Cloud 2 in Physics

A train traveling at a constant speed rounds a curve of radius 350 m. A chandelier suspended from the ceiling swings out to an angle of 15.0° throughout the turn. What is the speed of the train?

I got 91.63 m/s when I first tried, which according to my online guide is wrong?

2007-12-16 01:22:12 · 1 answers · asked by hahahahahaha 1 in Physics

2007-12-16 01:14:07 · 6 answers · asked by Anonymous in Physics

2007-12-16 01:13:12 · 4 answers · asked by Roger 1 in Biology

2007-12-16 01:03:55 · 2 answers · asked by Anonymous in Physics